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-rw-r--r--docs/Config_Reference.md5
1 files changed, 3 insertions, 2 deletions
diff --git a/docs/Config_Reference.md b/docs/Config_Reference.md
index d7dc8290..3c1f4017 100644
--- a/docs/Config_Reference.md
+++ b/docs/Config_Reference.md
@@ -1552,8 +1552,9 @@ section for the details).
```
[bltouch]
sensor_pin:
-# Pin connected to the BLTouch sensor pin. This parameter must be
-# provided.
+# Pin connected to the BLTouch sensor pin. Most BLTouch devices
+# require a pullup on the sensor pin (prefix the pin name with "^").
+# This parameter must be provided.
control_pin:
# Pin connected to the BLTouch control pin. This parameter must be
# provided.